Carbon neutral, net zero, climate neutral: what the claims actually require

The three terms are used interchangeably in marketing copy but mean technically different things and carry different evidential burdens. Not knowing the difference is how a claim becomes legally indefensible.

Carbon neutral

Carbon neutral means a product’s or organisation’s CO₂e emissions over a defined period have been balanced by an equivalent volume of offset credits. The critical point: emissions themselves need not have fallen. A company can be carbon neutral with no abatement at all, purely by buying credits — which is the most criticised aspect of the term.

Net zero

Net zero is a heavier commitment. It requires deep abatement along a science-based pathway — typically around 90 per cent — with only the remaining unavoidable emissions balanced by permanent carbon removal. Two words carry the weight: “remaining” and “removal”.

Removal is not avoidance. A deforestation-prevention project stops emissions occurring but does not draw carbon out of the atmosphere; afforestation, direct air capture or biochar do. A net zero claim expects residual emissions to be balanced with removal credits.

Climate neutral

Climate neutral is a broader term covering non-CO₂ climate effects as well — aviation contrails, or albedo changes from land use. In practice it is usually used as a synonym for carbon neutral, which is technically wrong. When choosing the term, state explicitly which effects are covered.

Offset quality: four tests

• Additionality — would the project have happened without credit revenue? If yes, the credit is meaningless.
• Permanence — how long does the stored carbon stay? Wildfire risk exists for forests, not for geological storage.
• Leakage — did the prevented activity simply move elsewhere? Forest protected in one area, felled in the next, nets to zero.
• Double counting — is the same reduction counted both in the host country’s national target and in your claim?

Credits passing all four tests are expensive. Credits at a few dollars a tonne are usually weak on at least one test; permanent removal credits run at hundreds of dollars a tonne. The price gap is a direct signal of the quality gap.

Measure before you claim

All three claims require a solid footprint calculation first — you cannot balance a quantity you have not measured. A neutrality claim built on a weak inventory becomes retroactively invalid once the inventory improves. The order is therefore: measure, reduce, balance what remains, disclose.